Green’s Dictionary of Slang

trip out v.1

[ext. of trip v.1 (1)]

1. [1960s+] to experience a hallucinogenic drug or a simulacrum thereof; also fig. use.

2. in fig. or ext. uses of sense 1.

(a) [1960s+] to lose control, to leave normality.

(b) [1960s+] to strike one as funny, crazy, extraordinary or amazing.

(c) [1970s+] to obsess or fantasize about.

(d) [1980s+] to be amazed, delighted.

(e) [1990s+] to feel confused.

(f) [1990s+] to confuse, to render someone emotionally unstable, to perturb.